You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
3.1 KiB
106 lines
3.1 KiB
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Andrei Borzenkov <arvidjaar@gmail.com>
|
|
Date: Wed, 16 May 2018 13:06:04 -0400
|
|
Subject: [PATCH] efi/uga: use 64 bit for fb_base
|
|
|
|
We get 64 bit from PCI BAR but then truncate by assigning to 32 bit.
|
|
Make sure to check that pointer does not overflow on 32 bit platform.
|
|
|
|
Closes: 50931
|
|
---
|
|
grub-core/video/efi_uga.c | 31 ++++++++++++++++---------------
|
|
1 file changed, 16 insertions(+), 15 deletions(-)
|
|
|
|
diff --git a/grub-core/video/efi_uga.c b/grub-core/video/efi_uga.c
|
|
index 044af1d20..97a607c01 100644
|
|
--- a/grub-core/video/efi_uga.c
|
|
+++ b/grub-core/video/efi_uga.c
|
|
@@ -34,7 +34,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
|
|
|
|
static grub_efi_guid_t uga_draw_guid = GRUB_EFI_UGA_DRAW_GUID;
|
|
static struct grub_efi_uga_draw_protocol *uga;
|
|
-static grub_uint32_t uga_fb;
|
|
+static grub_uint64_t uga_fb;
|
|
static grub_uint32_t uga_pitch;
|
|
|
|
static struct
|
|
@@ -52,7 +52,7 @@ static struct
|
|
#define FBTEST_COUNT 8
|
|
|
|
static int
|
|
-find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
+find_line_len (grub_uint64_t *fb_base, grub_uint32_t *line_len)
|
|
{
|
|
grub_uint32_t *base = (grub_uint32_t *) (grub_addr_t) *fb_base;
|
|
int i;
|
|
@@ -67,7 +67,7 @@ find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
{
|
|
if ((base[j] & RGB_MASK) == RGB_MAGIC)
|
|
{
|
|
- *fb_base = (grub_uint32_t) (grub_addr_t) base;
|
|
+ *fb_base = (grub_uint64_t) (grub_addr_t) base;
|
|
*line_len = j << 2;
|
|
|
|
return 1;
|
|
@@ -84,7 +84,7 @@ find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
/* Context for find_framebuf. */
|
|
struct find_framebuf_ctx
|
|
{
|
|
- grub_uint32_t *fb_base;
|
|
+ grub_uint64_t *fb_base;
|
|
grub_uint32_t *line_len;
|
|
int found;
|
|
};
|
|
@@ -129,7 +129,9 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
if (i == 5)
|
|
break;
|
|
|
|
- old_bar2 = grub_pci_read (addr + 4);
|
|
+ i++;
|
|
+ addr += 4;
|
|
+ old_bar2 = grub_pci_read (addr);
|
|
}
|
|
else
|
|
old_bar2 = 0;
|
|
@@ -138,10 +140,15 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
base64 <<= 32;
|
|
base64 |= (old_bar1 & GRUB_PCI_ADDR_MEM_MASK);
|
|
|
|
- grub_dprintf ("fb", "%s(%d): 0x%llx\n",
|
|
+ grub_dprintf ("fb", "%s(%d): 0x%" PRIxGRUB_UINT64_T "\n",
|
|
((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) ?
|
|
- "VMEM" : "MMIO"), i,
|
|
- (unsigned long long) base64);
|
|
+ "VMEM" : "MMIO"), type == GRUB_PCI_ADDR_MEM_TYPE_64 ? i - 1 : i,
|
|
+ base64);
|
|
+
|
|
+#if GRUB_CPU_SIZEOF_VOID_P == 4
|
|
+ if (old_bar2)
|
|
+ continue;
|
|
+#endif
|
|
|
|
if ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) && (! ctx->found))
|
|
{
|
|
@@ -149,12 +156,6 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
if (find_line_len (ctx->fb_base, ctx->line_len))
|
|
ctx->found++;
|
|
}
|
|
-
|
|
- if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
|
|
- {
|
|
- i++;
|
|
- addr += 4;
|
|
- }
|
|
}
|
|
}
|
|
|
|
@@ -162,7 +163,7 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
}
|
|
|
|
static int
|
|
-find_framebuf (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
+find_framebuf (grub_uint64_t *fb_base, grub_uint32_t *line_len)
|
|
{
|
|
struct find_framebuf_ctx ctx = {
|
|
.fb_base = fb_base,
|